On the development of dunes in erodible channels

J Fredsøe - Journal of Fluid Mechanics, 1974 - cambridge.org
Journal of Fluid Mechanics, 1974cambridge.org
A two-dimensional stability analysis of the flow in a straight alluvial channel has been
carried out, using the vorticity transport equation. In the analysis an attempt has been made
to account for the influence of gravity on bed-load transport, and this turned out to change
the stability quite significantly. In the case of instability, the further growth of the dunes has
been investigated using a second-order approximation, This nonlinear theory explains the
experimental fact that the dunes very soon become asymmetric.
A two-dimensional stability analysis of the flow in a straight alluvial channel has been carried out, using the vorticity transport equation. In the analysis an attempt has been made to account for the influence of gravity on bed-load transport, and this turned out to change the stability quite significantly.In the case of instability, the further growth of the dunes has been investigated using a second-order approximation, This nonlinear theory explains the experimental fact that the dunes very soon become asymmetric.
Cambridge University Press
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